Dresden 2003 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 49: Poster II

HL 49.32: Poster

Donnerstag, 27. März 2003, 16:30–19:00, HSZ/P2

Transport through Carbon Nanotube Dots between Superconductors — •Wolfgang Belzig, Mark Buitelaar, Thomas Nussbaumer, Christoph Bruder, and Christian Schönenberger — Universität Basel, Basel, Schweiz

We study resonant multiple Andreev reflections in a multiwall carbon nanotube quantum dots coupled to superconducting leads. The position and magnitude of the subharmonic gap structure is found to depend strongly on the level positions of the single-electron states which are adjusted with a gate electrode. We discuss a theoretical model of the device and compare the calculated differential conductance with the experimental data.